为了解决火法和无机酸法对废弃ITO玻璃粉末中铟锡分离效果差以及草酸法对铟浸出率较低的问题,提出采用草酸-草酸盐A浸出分离ITO玻璃粉末中的铟和锡,并采用响应面法对铟的浸出条件进行优化,建立预测铟的浸出率回归模型,确定浸出液中铟的...为了解决火法和无机酸法对废弃ITO玻璃粉末中铟锡分离效果差以及草酸法对铟浸出率较低的问题,提出采用草酸-草酸盐A浸出分离ITO玻璃粉末中的铟和锡,并采用响应面法对铟的浸出条件进行优化,建立预测铟的浸出率回归模型,确定浸出液中铟的存在形式,探索水解法回收铟的可行性。结果表明,草酸-草酸盐A浸出铟的优化条件为:c(C_(2)O_(4)^(2-))_(TOT)为0.09 mol/L,n(H_(2)C_(2)O_(4))∶n(A)为0.988∶1,液固比6.5 m L/g。在该条件下,铟的浸出率预测值和实验值分别为96.51%和97.69%,锡的浸出率仅为2.18%,铟锡分离效果较好。浸出液中的铟以In(C_(2)O_(4))_(3)^(3-)和In(C_(2)O_(4))_(2)^(2-)形式存在,可溶锡以Sn^(2+)和SnOH^(+)形式进入浸出液,且可采用水解法分离浸出液中的铟和锡,铟以In(OH)_(3)形式沉淀析出,锡留于浸出液。研究结果证明,采用草酸-草酸盐A浸出-浸出液水解工艺能提高铟的浸出率和铟锡的分离效果,解决了现有火法和湿法分离铟锡过程存在的技术缺陷。展开更多
A redox-active monolayer on an optically transparent electrode constitutes a typical platform for spectroelectrochemical sensing.The necessity for its sophistication arises from the availability of multi-dimensional s...A redox-active monolayer on an optically transparent electrode constitutes a typical platform for spectroelectrochemical sensing.The necessity for its sophistication arises from the availability of multi-dimensional sensing signals.Simultaneous monitoring of the redox current and color change synchronized with the oxidation state change significantly enhances sen-sitivity and selectivity.This study aimed to elucidate the modification of an indium tin oxide(ITO)electrode with a viologen monolayer with an ordered orientation.Novel methods were developed to immobilize a viologen molecule bearing a car-boxyl group to form assembled monolayers through a condensation reaction using 1-ethyl-3-(3-dimethylaminopropyl)-car-bodiimide with N-hydroxy-succinimide(EDC/NHS).In the two methods of immobilization,one utilizes a two-step process to firstly form an aromatic siloxane base layer and subsequently attach the viologen derivative through an amide linkage by post-amidation.The other employs a direct ester linkage between the hydroxyl groups of the ITO surface and the car-boxyl group of the viologen derivative.The latter method was also applied to immobilize a ferrocenyl group at a very short distance from the ITO surface.Potential-modulated UV-visible transmission absorption spectral measurement techniques with oblique incidence of plane-polarized light were employed to determine the orientation of the longitudinal axis of the reduced form of the viologen.The frequency dependence data of the potential-modulated transmission absorption signals were utilized to analyze the electron transfer kinetics.The performance of the two viologen-modified electrodes was com-pared to that of an ITO modified by post-amidation to the most commonly used base layer prepared with 3-aminopropyl triethoxysilane.展开更多
为研究氧化铟锡(indium tin oxide,ITO)导电玻璃材料的去除机理,采用单磨粒对材料进行切削仿真,建立了ITO导电玻璃的材料模型,根据加工表面形貌、应力和切削力情况分析了材料去除机理,之后研究了切削参数对切削力和残余应力的影响,并与...为研究氧化铟锡(indium tin oxide,ITO)导电玻璃材料的去除机理,采用单磨粒对材料进行切削仿真,建立了ITO导电玻璃的材料模型,根据加工表面形貌、应力和切削力情况分析了材料去除机理,之后研究了切削参数对切削力和残余应力的影响,并与钠钙玻璃进行对比分析。结果表明:在磨粒的切削过程中,材料的去除受ITO薄膜层、玻璃基底和内聚力接触行为的共同影响,会产生分层、通道开裂和层间断裂等失效形式;随着磨粒的进给,切削力在一定范围内波动,且呈现上升、稳定、降低的变化,同时磨粒的切削力与切削速度和切削深度呈正相关;薄膜上残余应力相比玻璃基底,数值更大且波动更剧烈;当切削深度接近ITO薄膜厚度时,薄膜的存在对磨粒切削行为的影响显著。展开更多
基于密度泛函理论,对氧化铟锡(Indium Tin Oxide,ITO)表面负载单原子Y模型的表面性能进行了第一性原理计算.根据表面能计算结果可知,单原子Y最稳定负载位置为空位(H),即确定了ITO负载单原子钇(Single-atom Y supported on ITO,Y/ITO)稳...基于密度泛函理论,对氧化铟锡(Indium Tin Oxide,ITO)表面负载单原子Y模型的表面性能进行了第一性原理计算.根据表面能计算结果可知,单原子Y最稳定负载位置为空位(H),即确定了ITO负载单原子钇(Single-atom Y supported on ITO,Y/ITO)稳定模型.对ITO和Y/ITO表面吸附气体分子(NO和CO)模型的吸附性能进行了第一性原理计算.根据对比ITO和Y/ITO表面的吸附能和态密度计算结果可知,单原子钇负载提高了ITO表面的稳定性和吸附性能.根据对比Y/ITO表面吸附NO和CO气体分子的吸附能和态密度计算结果可知,NO和CO气体分子吸附均为自发行为,过程放热.且NO气体分子更容易吸附在Y/ITO表面,即Y/ITO对NO气体分子更敏感.展开更多
文摘为了解决火法和无机酸法对废弃ITO玻璃粉末中铟锡分离效果差以及草酸法对铟浸出率较低的问题,提出采用草酸-草酸盐A浸出分离ITO玻璃粉末中的铟和锡,并采用响应面法对铟的浸出条件进行优化,建立预测铟的浸出率回归模型,确定浸出液中铟的存在形式,探索水解法回收铟的可行性。结果表明,草酸-草酸盐A浸出铟的优化条件为:c(C_(2)O_(4)^(2-))_(TOT)为0.09 mol/L,n(H_(2)C_(2)O_(4))∶n(A)为0.988∶1,液固比6.5 m L/g。在该条件下,铟的浸出率预测值和实验值分别为96.51%和97.69%,锡的浸出率仅为2.18%,铟锡分离效果较好。浸出液中的铟以In(C_(2)O_(4))_(3)^(3-)和In(C_(2)O_(4))_(2)^(2-)形式存在,可溶锡以Sn^(2+)和SnOH^(+)形式进入浸出液,且可采用水解法分离浸出液中的铟和锡,铟以In(OH)_(3)形式沉淀析出,锡留于浸出液。研究结果证明,采用草酸-草酸盐A浸出-浸出液水解工艺能提高铟的浸出率和铟锡的分离效果,解决了现有火法和湿法分离铟锡过程存在的技术缺陷。
基金supports by the Grant-in-Aid of Scientific Research of Challenging Research(Exploratory)(JP23K17738)to TS from MEXT of Japanthe 41st grant of research from Nippon Sheet Glass Foundation for Materials Science and Engineering to TS.
文摘A redox-active monolayer on an optically transparent electrode constitutes a typical platform for spectroelectrochemical sensing.The necessity for its sophistication arises from the availability of multi-dimensional sensing signals.Simultaneous monitoring of the redox current and color change synchronized with the oxidation state change significantly enhances sen-sitivity and selectivity.This study aimed to elucidate the modification of an indium tin oxide(ITO)electrode with a viologen monolayer with an ordered orientation.Novel methods were developed to immobilize a viologen molecule bearing a car-boxyl group to form assembled monolayers through a condensation reaction using 1-ethyl-3-(3-dimethylaminopropyl)-car-bodiimide with N-hydroxy-succinimide(EDC/NHS).In the two methods of immobilization,one utilizes a two-step process to firstly form an aromatic siloxane base layer and subsequently attach the viologen derivative through an amide linkage by post-amidation.The other employs a direct ester linkage between the hydroxyl groups of the ITO surface and the car-boxyl group of the viologen derivative.The latter method was also applied to immobilize a ferrocenyl group at a very short distance from the ITO surface.Potential-modulated UV-visible transmission absorption spectral measurement techniques with oblique incidence of plane-polarized light were employed to determine the orientation of the longitudinal axis of the reduced form of the viologen.The frequency dependence data of the potential-modulated transmission absorption signals were utilized to analyze the electron transfer kinetics.The performance of the two viologen-modified electrodes was com-pared to that of an ITO modified by post-amidation to the most commonly used base layer prepared with 3-aminopropyl triethoxysilane.
文摘为研究氧化铟锡(indium tin oxide,ITO)导电玻璃材料的去除机理,采用单磨粒对材料进行切削仿真,建立了ITO导电玻璃的材料模型,根据加工表面形貌、应力和切削力情况分析了材料去除机理,之后研究了切削参数对切削力和残余应力的影响,并与钠钙玻璃进行对比分析。结果表明:在磨粒的切削过程中,材料的去除受ITO薄膜层、玻璃基底和内聚力接触行为的共同影响,会产生分层、通道开裂和层间断裂等失效形式;随着磨粒的进给,切削力在一定范围内波动,且呈现上升、稳定、降低的变化,同时磨粒的切削力与切削速度和切削深度呈正相关;薄膜上残余应力相比玻璃基底,数值更大且波动更剧烈;当切削深度接近ITO薄膜厚度时,薄膜的存在对磨粒切削行为的影响显著。
文摘基于密度泛函理论,对氧化铟锡(Indium Tin Oxide,ITO)表面负载单原子Y模型的表面性能进行了第一性原理计算.根据表面能计算结果可知,单原子Y最稳定负载位置为空位(H),即确定了ITO负载单原子钇(Single-atom Y supported on ITO,Y/ITO)稳定模型.对ITO和Y/ITO表面吸附气体分子(NO和CO)模型的吸附性能进行了第一性原理计算.根据对比ITO和Y/ITO表面的吸附能和态密度计算结果可知,单原子钇负载提高了ITO表面的稳定性和吸附性能.根据对比Y/ITO表面吸附NO和CO气体分子的吸附能和态密度计算结果可知,NO和CO气体分子吸附均为自发行为,过程放热.且NO气体分子更容易吸附在Y/ITO表面,即Y/ITO对NO气体分子更敏感.
